LOINCActiveBoth

LOINC Code 51775-5: Chromatin Ab Qn

51775-5 is a LOINC code used to identify Chromatin Ab Qn in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Chromatin Ab. It is commonly used with the system or sample type Ser/Plas.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Chromatin Ab. It is commonly used with the system or sample type Ser/Plas.

When is it used?

  • Used in lab systems, EHRs, and clinical data exchange.
  • May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
  • Status: ACTIVE
  • Order vs observation: Both

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • Chromatin Ab [Units/volume] in Serum or Plasma
  • Chromatin Ab
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; Serology; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; UniversalLabOrders

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Chromatin Ab QnChromatin Ab [Units/volume] in Serum or PlasmaChromatin Ab SerPl-aCncChromatin AbSEROChromatin antibody, BloodACnc

Frequently asked questions

Code details

Code51775-5
SystemLOINC
Display nameChromatin Ab Qn
DescriptionChromatin Ab
Short nameChromatin Ab SerPl-aCnc
ComponentChromatin Ab
PropertyACnc
TimingPt
System (specimen)Ser/Plas
ScaleQn
ClassSERO
Example unitsarb U/mL
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.24
Last changed2.73

Consumer names

Chromatin antibody, Blood

Part names

Chromatin AbACncPtSer/PlasQnArbitrary ConcentrationPoint in time (spot)Serum or Plasma

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.